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SDIO and 50MHz ?

Question asked by H.Rick on Apr 12, 2014
Latest reply on Apr 12, 2014 by H.Rick
Guys,

Why can't I use 50MHz for SDIO ?
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

it worked only with 10MHz

 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
1./*!< Configure PC.08, PC.09, PC.10, PC.11, PC.12 pin: D0, D1, D2, D3, CLK pin */
2.  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
3.  //GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
4.  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
5.  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
6.  GPIO_Init(GPIOC, &GPIO_InitStructure);

Any ideas ?

thanks

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